1. Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China
2. Department of Cardiovascular Medicine, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
3. Department of Otorhinolaryngology Head and Neck Surgery, Hospital of Stomatology, Jilin University, Changchun, Jilin 130021, P.R. China